Build Wide-Range Audio Meter 5
Build An Active Power R Box 16
"Zap" New Life Into Dead NiCd Batteries 20
Build A Field Disturbance Sensor For Security 22
Protect Your Air Conditioner With A "Compressor Guard" 29
Build An Autoranging Digital Capacitance Meter 32
Build A Low-Cost A/D Converter 40
Build A Remote Antenna Selector Switch 45
Experimenting With Circular Sweep 48
Build A Stereo Blend Control 54
On-Touch Diode Tester 56
Build An Audio Compander 61
Build A Computer Music Box Peripheral 79
Build "Charge" 81
Build A Digital Phototachometer 91
Six CMOS Circuits For Experimeters 98
Four Easy-To-Biuld LED Projects 106
Build A Low-Cost SWR Tester 110